In the past three days we have received an overwhelming number of heart-felt tweets, letters, images and comments from our users -- people like you -- describing just how much Demi has touched the lives of her fans on her birthday.

Please continue to add your letters to Demi to the page. We will be updating the slideshow with your notes and images from Twitter throughout the night. Some of our favorite letters will be shared on the HuffPost Teen Facebook Page.

Previously 8/18/12: It's safe to say that Demi Lovato has hit her stride with her career. Her third studio album, "Unbroken," was a smash hit last year, she's currently sitting on the judging panel of "X Factor" alongside her real-life idol, Britney Spears, and she appears more healthy, happy, and confident than ever before. But Demi has had a lot to overcome since 2010, the year she she entered a treatment center because of her struggles with depression, bulimia and self-harm.

"You have to work every day, you have to fight every day. It's really important to get the message out there that if you do slip up, it's OK, because you are human. Just try, and try harder next time," Demi said.

In a world where the pressure to be perfect is ever-present in the lives of so many women, she's one celeb who has found the courage to be herself. And Demi's very personal, very public journey to finding self-love has inspired her fans, young and old, to stay strong in the face of their own day-to-day struggles.

HuffPost Teen blogger, Becca Fritz, recently shared her own brave story of entering an eating disorder clinic. She listened to Demi's music for the first time during treatment.

"I just couldn't believe that someone who I had never met, never spoken to could narrate my life and my emotions so perfectly," Becca said. "Each time I get up to speak, I think about how much Demi helped me by being so candid with both her music and her personal life, and I take a deep breath and tell my story in hopes of being that voice for someone else."

In honor of Demi's 20th birthday this Monday, August 20th, we're compiling letters from our readers about what Demi means to them.

#Lovatics, that means you! Share with us all your letters, photos, drawings, writings or cards to Demi for her birthday. We'll feature them all in a "Letters To Demi" slideshow on HuffPost Teen on Monday!

Here's how you can submit them:

  • You can add your images to the slideshow below

  • You can write a quick note in the comments

  • You can share them on Twitter with the tag #LettersToDemi

  • You can share it on Instagram with the tag #LettersToDemi

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  • From Becca Fritz


    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">jessikacuicapuz</a>:<br />I STAY STRONG FOR YOUR SAKE ..THANK UU SO MUCH MY LOVELY GIRL AND HAPPY BIRTHDAY SWEETIE ....WE LOVE YOU SOO MUCH ...YOU ARE A TRUE INSPIRATION FOR US "LOVATICS"

  • Happy 20th Birthday Demi. Love you so much

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">tristin1433</a>:<br />LOVE YOU DEMI.

  • Demi's 20th Birthday

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">dtflovato</a>:<br />Happy 20th Birthday Demi

  • Happy 20th Birthday Demi!

    I made this video for Demi and I worked really hard on it I hope she sees it! Happy Birthday Demi!!!

  • From Jasmine

  • From Danielle

  • demi's birthday xxx

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">PowerOfLovatics</a>:<br />HAPPY BIRTHDAY DEMI !!! hope you have an awesome day on the big 20th xx LOVE YOU SO MUCH u mean the world to me

  • From Michelle Pham aka @crazymichelle24

  • Happy Birthday from A Lovatic

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">DdLovaticD</a>:<br />Happy 20th. My baby is all grown up. Demi is my inspirationn. She is currently helping me through issues of my own. Follow my twitter @DdLovaticD for more.

  • From Torie

  • What Demi Lovato Means to Me

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">musicaljenius</a>:<br />Demi Lovato has saved my life (and millions of others) in many ways and I couldn't do or say anything to thank her. I can only hope my support and dedication to her can be enough. Love you so much Demi and Happy birthday! (fellow Leo =]) Twitter: @musicaljenius YouTube: hendrixluvr

  • From Jasmine

  • From Cindy

  • <a href="" target="_hplink">@GirlsaLovatic</a>: Demi you are the one who showed me light in my darkness. You are the reason iknow it will be okay. #LetterstoDemi

  • Maya Lovatic

  • happy 20th birthday, demi!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">LiveLov3Lovat0</a>:<br />happy birthday demi, i love you. heres a special picture i mde for you

  • happy birthday demi

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">LiveLov3Lovat0</a>:<br />


    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">Lauren Lovatic</a>:<br />Happy birthday beautiful lady. I love you! I kinda sorta missed a word... I was focused. Have a magnificent birthday!!! xoxo

  • Happy Birthday Demi!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">melissayang13</a>:<br />Happy Birthday Demi!!

  • Demi's birthdaaay!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">LovatoLoveLife</a>:<br />Happy Birthday Demi! I love you so flaming much, Lovatic since 2008! Stay Strong, you're gorgeous!

  • <a href="" target="_hplink">@efesque97</a>

  • <a href="" target="_hplink">@MySkinnyLove821</a>

  • <a href="" target="_hplink">@MySkinnyLove821</a>

  • Demi's 20th Birthday

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">Demi August20th</a>:<br />#letterstodemi Demi has been my idol since 2007. I will love her forever. Happy Birthday Demi

  • Happy Birthday Beautiful

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">Lenymar Matos</a>:<br />Demi, you are such an inspiration. You are beautiful inside and out. I wish you an amazing birthday. Love, Leny ♥

  • Rise Like A Skyscraper!!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">LovaticDSmiler</a>:<br />Demi Happy Birthday !! I Love You !! ohmygosh can't believe my little girl 20 *Cries* Demz i wanna thank you for everything!! You're amazing !! Enjoy your birthday Xoxo ;D

  • Happy Birthday Demi Lovato!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">Yvonne Chai</a>:<br />I love you Demi! Everytime you sing i get shivers and i wish u the best! #Lovatic

  • Happy Birthday Demi

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">MyDemiSparkles</a>:<br />Happy Birthday Demi I Love You

  • Happy Birthday Beautiful :D

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">unbrokenkathleen</a>:<br />HAPPY BIRTHDAY BEAUTIFUL!!! I hope you have an amazing year, you deserve all the happiness in the world. I know everyone says this but thankyou, I owe you my life, you are my hero and my inspiration. I will stay strong for you. I love you heaps. Love Kathleen from Australia :)

  • Love is Louder

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">sopieq</a>:<br />thanks Demi!!!

  • Happy Birthday Demi

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">KarinaaaBean</a>:<br />Happy Birthday Dems

  • <a href="" target="_hplink">@goodvibes1D</a>

  • <a href="" target="_hplink">@MB_ImmortalLove</a>

  • Happy 20th Birthday

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">Tomas Mota</a>:<br />Happy 20th Birthday! I've been following you ever since you stared in Camp Rock and I'd like to thank you for being there. You and your music have been there for me through my highs and lows and for that I'm thankful. Thank you for being a part of my life and brightening my life everyday. Stay Strong

  • I love you.

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">katydellovato</a>:<br />Love you more than anything Demetria Devonne xxxxxxxxxxxxxxx

  • <a href="" target="_hplink">@TheDelenaTeam_</a>

  • <a href="" target="_hplink">@PrincessCTianna</a>: #LettersToDemi I was so inspired at the Aug 12th concert that I taught myself how to play some of your songs on piano.

  • <a href="" target="_hplink">@DemiBeliever18</a>: #LettersToDemi I truly cant explain how much u mean 2 me u were gave a voice 4 a reason & u did the right thing wit it

  • <a href="" target="_hplink">@StronglikeDeemi</a>: #LettersToDemi Happy Birthday Demi!! I love you so so so so much!!!

  • <a href="" target="_hplink">@musiclover034</a>: #LettersToDemi Demi I love you you're my Kelly & so much more. You're beyond words! Happy 20th! #StayStrong

  • Happy Birthday Demi!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">italkdemi</a>:<br />Happy Demi. i hope you have the best day ever. you have no idea how much you've helped me the past year. i've always been a fan, but this past year you have honestly helped me so much. not one 'thank you' is enough. from the bottom of my heart, enjoy your 20th birthday. thanks for staying strong.♥

  • DemiToAustralia❤☺

  • Happy Birthday Demi!

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">DemiDomination</a>:<br />Happy Birthday Demi!

  • My Drawing Of Demi

    <a href=""><img style="float:left;padding-right:6px !important;" src="" /></a><a href="">DemiBluevato98</a>:<br />Here's a picture I drew of Demi, I hope she likes it and has a happy 20th birthday :)